iwlwifi: avoid read/write operations if the bus is dead

[cascardo/linux.git] / drivers / net / wireless / iwlwifi / mvm / mac80211.c

diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index 5ce29ff..8e69ab2 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -1137,6 +1137,12 @@ void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
 
        lockdep_assert_held(&mvm->mutex);
 
+       /* there's no point in fw dump if the bus is dead */
+       if (test_bit(STATUS_TRANS_DEAD, &mvm->trans->status)) {
+               IWL_ERR(mvm, "Skip fw error dump since bus is dead\n");
+               return;
+       }
+
        if (mvm->fw_dump_trig &&
            mvm->fw_dump_trig->mode & IWL_FW_DBG_TRIGGER_MONITOR_ONLY)
                monitor_dump_only = true;